# TrustStoreHolder.java

    /*
     *  Licensed to the Apache Software Foundation (ASF) under one
     *  or more contributor license agreements.  See the NOTICE file
     *  distributed with this work for additional information
     *  regarding copyright ownership.  The ASF licenses this file
     *  to you under the Apache License, Version 2.0 (the
     *  "License"); you may not use this file except in compliance
     *  with the License.  You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     *  Unless required by applicable law or agreed to in writing,
     *  software distributed under the License is distributed on an
     *   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     *  KIND, either express or implied.  See the License for the
     *  specific language governing permissions and limitations
     *  under the License.
     */
    package org.apache.synapse.transport.nhttp.config;

    import java.security.KeyStore;

    /**
     * A data holder class to store the client trust store.
     */
    public class TrustStoreHolder {

        private static volatile TrustStoreHolder instance;
        private KeyStore clientTrustStore;

        private TrustStoreHolder() {}

        public static TrustStoreHolder getInstance() {

            if (instance == null) {
                synchronized (TrustStoreHolder.class) {
                    if (instance == null) {
                        instance = new TrustStoreHolder();
                    }
                }
            }
            return instance;
        }

        public KeyStore getClientTrustStore() {

            return clientTrustStore;
        }

        public void setClientTrustStore(KeyStore clientTrustStore) {

            this.clientTrustStore = clientTrustStore;
        }

        /**
         * Reset the instance.
         */
        public static void resetInstance() {

            instance = null;
        }
    }